I have a 2008 mini cooper clubman s turbo. It started to stall and jerk when driving, lose power when trying to accelerate. I replaced the O2Sensor downstream as well as the MAF.It then would not stay running at all and would die immediately after starting it. I let it sit for a week and then one day it started running fine but only for about 3 days. Its back to stalling, losing power, dying at random times. I cant afford to keep replacing parts that don't need to be so i was wondering if anyone has had a slimier problem? The code its throwing is P115D.